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Finding the Fourth Proportional to 8,663.94, 12,999.15 and 6,490.98

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Solution

The fourth proportional to 8,663.94, 12,999.15 and 6,490.98 is: 9,738.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,663.94 : 12,999.15 = 6,490.98 : x
  2. Step 2: Convert to fraction form
    8,663.94/12,999.15 = 6,490.98/x
  3. Step 3: Cross multiply
    8,663.94x = 12,999.15 × 6,490.98
  4. Step 4: Simplify right side
    8,663.94x = 84,377,222.67
  5. Step 5: Solve for x
    x = 84,377,222.67/8,663.94
  6. Step 6: Final answer
    x = 9,738.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.